What Is The Difference Between Sua And Full Feature Nat; Is It Possible To Access A Server Running Behind Sua From The Outside Internet? How Can I Do It; When Do I Need Select Full Feature Nat - ZyXEL Communications P-660HN-T1A Support Notes

packet (since it is now moving in the opposite direction), the checksums are
recomputed, and the packet is delivered to its true destination. This is because
SUA keeps a table of the IP addresses and port numbers of the local systems
currently using it.

9. What is the difference between SUA and Full Feature NAT?

There will be three options for you:

None

SUA Only

Full Feature
SUA (Single User Account) is a NAT set with 2 rules: Many-to-One and
Server. With SUA, 'visible' servers had to be mapped to different ports, since
the servers share only one global IP.
The P-660HN-T1A now has Full Feature NAT which supports five types of
IP/Port mapping: One to One, Many to One, Many to Many Overload, Many to
Many No Overload and Server. You can make special application when you
select Full Feature NAT. For example: With multiple global IP addresses,
multiple severs using the same port (e.g., FTP servers using port 21/20) are
allowed on the LAN for outside access.
The P-660HN-T1A supports NAT sets on a remote node basis. They are
reusable, but only one set is allowed for each remote node. The P-660HN-T1A
supports 8 sets since there are 8 remote nodes.
By fatory default, the NAT is select as SUA in Web Configurator, Advanced
Setup, Network -> NAT -> General -> NAT Setup.
10. Is it possible to access a server running behind SUA from the outside
Internet? How can I do it?
Yes, it is possible because P-660HN-T1A delivers the packet to the local
server by looking up to a SUA server table. Therefore, to make a local server
accessible to the outside users, the port number and the inside IP address of
the server must be configured. (You can configure it in Web Configurator,
Advanced Setup, Network -> NAT -> Port Forwarding).

11. When do I need select Full Feature NAT


Make multiple local servers on the LAN accessible from outside with
multiple global IP addresses
All contents copyright © 2010 ZyXEL Communications Corporation.
P-660HN Series Support Notes
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